package com.schoolpro.handler;

import com.schoolpro.constant.MessageConstant;
import com.schoolpro.exception.BaseException;
import com.schoolpro.exception.ItemException;
import com.schoolpro.exception.ParamValidationException;
import com.schoolpro.exception.PropertyException;
import com.schoolpro.pojo.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import java.sql.SQLIntegrityConstraintViolationException;

/**
 * 全局异常处理器，处理项目中抛出的业务异常
 */
@RestControllerAdvice
@Slf4j
public class GlobalExceptionHandler {

    /**
     * 捕获业务异常
     * @param ex
     * @return
     */
    @ExceptionHandler
    public Result exceptionHandler(BaseException ex){
        log.error("异常信息：{}", ex.getMessage());
        return Result.error(ex.getMessage());
    }

    /**
     * 处理参数校验异常
     * @param e
     * @return
     */
    @ExceptionHandler
    public Result handleParamValidationException(ParamValidationException e) {
        log.error("参数校验失败：{}", e.getMessage());
        return Result.error(e.getMessage());
    }

    /**
     * 处理属性异常
     * @param e
     * @return
     */
    @ExceptionHandler
    public Result<Object> handlePropertyException(PropertyException e) {
        return Result.error(e.getMessage());
    }

    /**
     * 处理表项异常
     * @param e
     * @return
     */
    @ExceptionHandler
    public Result<Object> handleItemException(ItemException e) {
        log.error("数据异常：{}", e.getMessage());
        return Result.error(e.getMessage());
    }

    /**
     * 处理SQL异常
     * @param ex
     * @return
     */
    @ExceptionHandler
    public Result exceptionHandler(SQLIntegrityConstraintViolationException ex){
        String message = ex.getMessage();
        if (message.contains("Duplicate entry")) {
            String[] split = message.split(" ");
            String username = split[2].substring(1, split[2].length() - 1);
            String msg = username + MessageConstant.ALREADY_EXISTS;
            return Result.error(msg);
        } else {
            return Result.error(MessageConstant.UNKNOWN_ERROR);
        }
    }


}
